En majo niaj geavoj venos al la urbo, kaj ni montros al ili la novan parkon.

Yes. En majo means in May.

Esperanto often uses en for months, years, seasons, and other time expressions:

• en majo = in May
• en 2026 = in 2026
• en somero = in summer

You may also sometimes see the accusative of time without a preposition in Esperanto, but en majo is a very normal and clear way to say it.

In Esperanto, names of months are usually not capitalized unless they begin a sentence.

So:

• majo = May
• januaro = January
• septembro = September

This is different from English.

Because niaj describes geavoj, and geavoj is plural.

In Esperanto, adjectives and possessives agree with the nouns they modify in number:

• nia avo = our grandfather
• nia avino = our grandmother
• niaj geavoj = our grandparents

So the -j on niaj matches the plural noun geavoj.

Geavoj means grandparents.

It is made from:

• avoj = grandfathers / grandfathers as a plural masculine form
• ge- = a prefix showing both sexes together

So:

• avo = grandfather
• avino = grandmother
• geavoj = grandparents

The prefix ge- is very common for family words:

• gepatroj = parents
• gefratoj = brothers and sisters / siblings
• geedzoj = الزوج and wife together / spouses

In modern Esperanto, ge- usually implies a mixed-sex group or both male and female members together.

Because -os is the Esperanto ending for the future tense.

Verb endings are very regular:

• venas = comes / is coming
• venis = came
• venos = will come
• venus = would come
• veni = to come

So niaj geavoj venos means our grandparents will come.

The same pattern appears in montros:

• montri = to show
• montros = will show

Al means to.

So:

• veni al la urbo = to come to the city

Esperanto often uses al when the sentence expresses movement toward a place:

• iri al la lernejo = go to the school
• veturi al Londono = travel to London
• veni al la urbo = come to the city

This is very similar to English to.

Normally, no. Veni does not take a direct object here, so you use al for the destination.

• venos al la urbo = will come to the city

Esperanto sometimes uses the accusative -n to show direction with certain expressions, especially where no preposition is used, but with veni + a destination, al is the standard and easiest choice.

So for a learner, veni al ... is the safest pattern.

Because ili is the indirect object here: to them.

The structure is:

• montri ion al iu = to show something to someone

So:

• ni montros al ili la novan parkon = we will show them the new park = literally, we will show to them the new park

In Esperanto, the person receiving something is often introduced with al:

• mi donis libron al ŝi = I gave a book to her
• li rakontis historion al ni = he told a story to us
• ni montros la parkon al ili = we will show the park to them

No. That would be wrong here.

Ilin would make them into a direct object, but with montri, the thing shown is the direct object, and the person you show it to is usually introduced by al.

Correct:

• ni montros al ili la novan parkon

Not correct in this meaning:

• ni montros ilin la novan parkon

So remember:

• montri ion al iu = show something to someone

Because la novan parkon is the direct object, and in Esperanto the adjective must agree with the noun.

Breakdown:

• parko = park
• parkon = park + direct object -n
• nova = new
• novan = new + matching direct object -n

So:

• la nova parko = the new park
• la novan parkon = the new park as a direct object

This agreement rule is very important in Esperanto:

• plural noun → adjective also gets -j
• accusative noun → adjective also gets -n
• both plural and accusative → adjective gets -jn

Examples:

• la granda domo
• la grandan domon
• la grandaj domoj
• la grandajn domojn

Esperanto uses -n to mark the direct object, which makes sentence structure very clear.

In this sentence:

• ni = subject
• montros = verb
• al ili = indirect object
• la novan parkon = direct object

The -n tells you that the new park is what will be shown.

This lets Esperanto have flexible word order without causing much confusion.

La is the definite article, like English the.

So:

• la urbo = the city
• la novan parkon = the new park

Esperanto has only one article: la. It does not change for gender, number, or case.

Why use it here?

• la urbo probably refers to a specific city known from context
• la novan parkon refers to a specific new park

If the speaker meant a new park, they would usually say:

• novan parkon without la

Yes, to some extent.

Because Esperanto marks the direct object with -n, word order is more flexible than in English.

For example, these are all possible:

• Ni montros al ili la novan parkon.
• La novan parkon ni montros al ili.
• Al ili ni montros la novan parkon.

They all mean roughly the same thing, though the emphasis changes:

• putting la novan parkon first emphasizes the park
• putting al ili first emphasizes to them

Still, the original order is the most neutral and natural for learners.

Esperanto normally keeps the subject pronoun.

So:

• ni montros = we will show

Unlike Spanish or Italian, Esperanto verbs do not change form for different persons, so the pronoun is usually needed:

• mi montros
• vi montros
• li montros
• ni montros

All use the same verb form montros, so without the pronoun, it would often be unclear who is doing the action.

Usually it means grandparents as a mixed pair or mixed group, not necessarily with mathematical precision.

In normal usage, niaj geavoj is the standard way to say our grandparents.

The important idea is that ge- includes both male and female family members together. In everyday speech, it is the natural word to use here.

It has two clauses joined by kaj:

1. En majo niaj geavoj venos al la urbo

   • En majo = in May
   • niaj geavoj = our grandparents
   • venos = will come
   • al la urbo = to the city

2. kaj ni montros al ili la novan parkon

   • kaj = and
   • ni = we
   • montros = will show
   • al ili = to them
   • la novan parkon = the new park

So the pattern is very regular:

• time expression
• subject
• verb
• place / direction
• kaj
• subject
• verb
• indirect object
• direct object

That regularity is one of the nice features of Esperanto.